info:eu-repo/semantics/article
Genomic affinity in hybrids of B-genome Arachis species: new genetic resources toward peanut improvement
Fecha
2021-09Registro en:
García, Alejandra Vanina; Silvestri, María Celeste; Vandecaveye, Melina Antonella; Custódio Alves, Raquel; de Carvalho Moretzsohn, Márcio; et al.; Genomic affinity in hybrids of B-genome Arachis species: new genetic resources toward peanut improvement; Brazilian Soc Plant Breeding; Crop Breeding And Applied Biotechnology; 21; 3; 9-2021; 1-10
1518-7853
1984-7033
CONICET Digital
CONICET
Autor
García, Alejandra Vanina
Silvestri, María Celeste
Vandecaveye, Melina Antonella
Custódio Alves, Raquel
de Carvalho Moretzsohn, Márcio
Lavia, Graciela Inés
Resumen
Peanut (Arachis hypogaea L.) is an important oilseed crop and food legume that is highly susceptible to biotic and abiotic factors. Wild Arachis species represent useful genetic resources because of their resistance to pests and diseases. In particular, understanding the affinity between B-genome species is important for broadening the genetic base of A. hypogaea (AABB genome), since only one population of A. ipaënsis is known, and relatively few other species have been described. Therefore, we aimed to determine the genomic affinity between A. ipaënsis and A. williamsii by developing hybrids. Microsatellite markers verified the hybrid status, and chromosome pairing and pollen viability results revealed that the species share high genomic affinity. Additionally, the presence of dyads detected in sporad and pollen analyses indicated the production of 2n gametes. These results will be useful for performing evolutionary studies and developing strategies for introgression programs to improve the B genome of A. hypogaea.